Junction-box.



Patented Jan. 9, 1912.

W. S. TIMMIS. JUNCTION BOX. APPLICATION FILED Nov. Is, 1906.

' To all whore 'it may concerm. .i

UNITED sTATEs .PATENT oFFloE.

WALTER s. 'r11/rms, or NEW YORK, N.

JUNCTION-Box.

Be it known that I, WALTER'S. TIMMis, a citizen of the United States ofAmerica, residing at Avondale street, Brooklyn Manor, VVoodhaven, in theborough of Queens, city and State of New York, have invented a new anduseful Junction-Box; and. I do hereby declare the following to be afull, clear, and exact description of the same.

The present invention'relates, especially,

ythe way also devised by me.

Figure 1 of the drawings is a sectional yview of part of a floor of abuilding, illustrating floor-girders and a concrete floor constructionsupported thereby and showing one form of my new junction-box, and themanner of securing and employing such box; Fig. 2 is a detailed view,partly section and partly full, in elevation, of the junction- Ubox;Fig. 3 is a plan View, cutaway on the 'asis line Sli-94, of said box;and Fig. Il is a bottom View, also partly cut away, of the box.

The preferred form of j unction-box, conlsists of a somewhat longtubular body 1, a lid 2 itted'to one end (the upper) of the body, and acover plate screwed to the other end (the lower) of said body. Saidjunction-box, in use, will have one or more tubereceiving openings 4,which may result from removing partly-punched plugs 5 (Figs. 1,

3 and `4) in the usual way.

The lid 2 is preferably provided with a continuous edge-flange 7, andwith a plurality of grip ingvmeans, such as spring-lips 8 extending romthe edge of the flange 7. Said lid is fitted to one end of the body byhaving the edge-ange 7 closely tit to the edge of the tube, and thespring-lips 8 enter depressions or recesses@ in the body near the upperend thereof. Thus the lid may be readily and'tightly fitted to place,and may, by a slight twist, also be easily removed from the body. y

At the end opposite the lid, the body 1 is proyidedwith inwardly-turnedlips 10, and

Specieation of Letters Patent.

Patented Jan. 9,1912.

Application mee November 1s, 190e. ,serial No. 343,236.

' these lips afford the means whereby a cover or cover-plate 3 isscrewed to place. Screws 11, engaging the cover 3 and the lips 10, areemployedl forthis purpose. l

At its center, the cover 3 is provided with an opening, wherein isfitted a bushing 12 .also having a central opening 13 and a milled edge14, for readily screwing the bushing into and out of the cover. Saidcover around the Central opening, is provided with adownwardly-extending li-ange or rim 15. f y

` A junction-box, of the kind shown and described, may be used in anyway desired. In

the drawings, I.have shown it fitted to av licor-construction, such forinstance, as a Hoor-slab 16, which may be a mass .of hardened concreteformed directlyv around or iitted between fioor-girders 19. Suchlicorslab, when formed according to my invention, has an openingextending -from the top to the bottom of theV slab, and entirely throughthe` same, and the junction-box, in the form preferred by me, is longerthan the depth of the floor-slab, so that when the bottom edge of thebody (whereat the lips 10 are provided) is level with the bottom ofthe'ioor-slab, the upper end of the body 1 projects above the upper face17 o` the floor-slab sufficiently to leave the ltube-leceiving openings4 also above the upper face of the slab. The body or box 1 may betightly or loosely fitted into the opening of the slab, but I preferthat such body shall be fixedly held to place by the hardening of theoriginal concrete of the slab o r by the hardening of added concrete.

To hold the body in the desired relation to the slab I provide such bodywith external stops, such as pegs 35 riveted (as shown at 36) to thebody, which rest upon the upper face 17 of the floor-slab.

It will bc seen, therefore, that a junctionbox of the kind described,fitted in the described manner to a floor-slab, permits (as shown inFig. 1) conductor tubes 18 to be in alinement with and directly enterthetube-receiving openings 4, without the inter` position of elbows ofA anykind, permits the fastening ofthe tubes and contained conductors toplace in the body at any time before the floor is finished, and permitsthe conductors to be inserted or changed at any time after the floor isfinished, by removal of the cover plate 3. After the conductortubes 18and conductors have been connected :is desired7 the lid 2 will be fittedto place, and concrete 2l will be poured above the tubes and lid andbetween 'the sleepers 2O und allowed to harden. Thereafter the boards 22muy be secured to the sleepers.

What ciuifm is:

1. In :i junction box, a tubular body having :1 tube-reeeivingji`opening near one of its ends and provided with means for holding saidbody in desired relation to ai slab when fitted thereto, in combinationwith caps secured to the uppe und lower ends of the tubular body, one ofsaid caps provided with an insulating bushing {it/ting within :inogening of the Cap,

2. In e junction-box, i tubular body provided With e tube receivingopening near one end of the body and a, stoo projecting outwardly fromthe exterior oi said body, in combination with caps secured to the u permid lower ends of the tubular body, t e last-named cap having an openingtherethrough and :in insulating bushing fitted in said carp.

In testimony whereof', l have signed my naine to this specification inthe' presence of two subscribing` witnesses.

WALTER sTiMMis.

Witnesses i CHESTER ARTHUR SLOCUM, ROBERT PoLK SGHOENIJAHN.

